Fluorescent Brightener OB 184 (CAS 7128-64-5) is a highly effective optical brightening agent with a distinct chemical structure that enables it to impart exceptional whiteness and fluorescence. Its molecular formula, C26H26N2O2S, and its classification as a thiophenediyl benzoxazole derivative underscore its advanced chemical properties. This compound is specifically designed to absorb ultraviolet light and re-emit it in the visible blue spectrum, thereby masking yellowness and enhancing the perceived brightness of materials.

The primary applications for Fluorescent Brightener OB 184 span across several key industries. In the plastics sector, it is widely used to whiten polymers such as polyvinyl chloride (PVC), polypropylene (PP), and polyester fibers. Its excellent thermal stability, with a melting point typically between 196-205°C, makes it suitable for high-temperature processing methods common in plastic manufacturing. Manufacturers often buy this brightener to improve the aesthetic quality of their plastic products, films, and synthetic fibers.

Furthermore, Fluorescent Brightener OB 184 finds significant utility in the paints, coatings, and printing inks industries. Its incorporation into these formulations leads to brighter colors, sharper contrast, and an overall more appealing visual finish. The ability to consistently achieve these results makes it a sought-after additive for companies aiming to enhance their product's market appeal.

For procurement managers and research scientists, understanding the sourcing landscape is as important as understanding the product itself. Reliable suppliers, particularly from China, offer high-purity grades (often ≥99%) at competitive prices. When looking to purchase Fluorescent Brightener OB 184, it is advisable to consult with established chemical manufacturers and distributors who can provide comprehensive product data sheets, safety information, and consistent supply chains.

In essence, Fluorescent Brightener OB 184 is a critical additive for achieving superior whiteness and brightness. By understanding its properties, applications, and the importance of sourcing from reputable suppliers, manufacturers can effectively leverage this advanced chemical to meet their product development and quality goals.